Makhan Singh, who was allegedly in possession of the contraband, was moving in a truck from New Delhi to Amritsar for the delivery of the drug yesterday, a DRI official said.
Acting on a tip-off, the truck was stopped near Ladhowal toll plaza and six kg of heroin was allegedly recovered from Makhan, official said.
Makhan had taken lift in a truck laden with sweet potatoes, the official said, adding, the truck driver was let off as he was not involved in the crime.